CN108941357A - A kind of steel pipe seam recognition positioning method based on magnetic flux leakage - Google Patents
A kind of steel pipe seam recognition positioning method based on magnetic flux leakage Download PDFInfo
- Publication number
- CN108941357A CN108941357A CN201810598303.6A CN201810598303A CN108941357A CN 108941357 A CN108941357 A CN 108941357A CN 201810598303 A CN201810598303 A CN 201810598303A CN 108941357 A CN108941357 A CN 108941357A
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- China
- Prior art keywords
- steel pipe
- magnetic
- magnetic flux
- flux leakage
- positioning method
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Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 230000004907 flux Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000005415 magnetization Effects 0.000 claims abstract description 5
- 230000001939 inductive effect Effects 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/18—Advancing work in relation to the stroke of the die or tool by means in pneumatic or magnetic engagement with the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
本发明公开了一种基于漏磁场的钢管焊缝识别定位方法，其特征在于包括：两块永磁体，磁轭，两个汇聚磁感线的导磁块，安装在导磁块中间位置、钢管正上方的磁传感器，以及滤波器，放大器和控制器。永磁体与磁轭和导磁块形成磁化回路。将钢管放置在两个导磁块中间，钢管会被磁化，进而在焊缝正上方形成漏磁场，将磁传感器固定在钢管正上方的位置保持不动，旋转钢管，当焊缝位于磁传感器正下方时，磁传感器将拾取到漏磁信号，经过滤波器、放大器，将焊缝的位置信息传递给控制器，进而实现焊缝的识别与定位。
The invention discloses a method for identifying and locating weld seams of steel pipes based on magnetic field leakage, which is characterized in that it comprises: two permanent magnets, a yoke, and two magnetic guide blocks for converging magnetic induction lines, which are installed in the middle of the magnetic guide blocks and the steel pipe Directly above the magnetic sensor, along with the filter, amplifier and controller. The permanent magnet forms a magnetization circuit with the yoke and the magnetic block. Place the steel pipe between the two magnetic blocks, the steel pipe will be magnetized, and then form a leakage magnetic field directly above the weld, fix the magnetic sensor at the position directly above the steel pipe and keep it still, rotate the steel pipe, when the weld seam is located directly above the magnetic sensor When it is down, the magnetic sensor will pick up the magnetic flux leakage signal, pass the filter and amplifier, and transmit the position information of the weld to the controller, so as to realize the identification and positioning of the weld.
Description
Technical field
The present invention relates to steel pipe processing technique fields, and in particular to a kind of steel pipe seam identification positioning side based on magnetic flux leakage
Method is, it can be achieved that accurate positionin to steel pipes with straight weld seam.
Background technique
Steel pipes with straight be a kind of weld seam with the longitudinal parallel steel pipe of steel pipe, because of its simple production process, high production efficiency is raw
It produces at low cost, is able to fast development, has been widely used in the construction of originally water and wastewater industry, petrochemical industry etc. now,
More occupy considerable status on aircraft and its engine.
Steel pipes with straight in use, generally requires first to carry out bend pipe processing, required for steel pipes with straight is bent to
Shape.During bend pipe, if the position of weld seam is in the side of steel pipe upper stress concentration, it is be easy to cause weld cracking, is produced
Product cannot reach requirement, therefore it is necessary to the knowledge of weld seam is carried out to steel pipe before steel pipes with straight carries out bending operation
Not with positioning.For the degree of automation for improving weld and HAZ, patent 201610000874.6 discloses a kind of steel pipe seam identification
Positioning device, the device by being arranged feed mechanism energy automatic transportation steel pipe, the setting positioning of feed mechanism side on the table
Mechanism energy automatic identification weld seam, and when weld seam reaches specified orientation, it shuts down, thus realize the positioning of weld seam, structure letter
It is single, high degree of automation.But it is that inductor sensitivity is not high enough using main problem existing for aforesaid way, it is understood that there may be leakage
The case where inspection or repeated detection can just find position while welding, low efficiency.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of, the steel pipe seam based on magnetic flux leakage identifies positioning side
Method realizes the quick identification and positioning of weld seam, carries out preliminary preparation for the bending of steel pipes with straight.
A kind of steel pipe seam recognition positioning method based on magnetic flux leakage provided by the invention, composition includes: two permanent magnetism
Body, a magnetic yoke, two convergence magnetic induction lines magnetic inductive block, steel pipe is placed between magnetic inductive block, and Magnetic Sensor is fixed on steel pipe table
Face, holding position is motionless, and for the filter of signal processing, amplifier and controller.
The realization mechanism of apparatus of the present invention is that permanent magnet and magnetic yoke and magnetic inductive block form magnetization cycle.Steel pipe is placed on two
Among a magnetic inductive block, steel pipe can be magnetized, and then magnetic flux leakage is formed right above weld seam, by Magnetic Sensor be fixed on steel pipe just on
The position of side remains stationary, rotating steel tube, and when weld seam is located at immediately below Magnetic Sensor, Magnetic Sensor, which will be picked up to leakage field, to be believed
Number, through wave filter, the location information of weld seam is passed to controller, and then realizes the identification and positioning of weld seam by amplifier.
In the above-mentioned technical solutions, the quantity of the permanent magnet is no less than 2, and is even number.The permanent magnet is preferentially adopted
The permanent magnet for being 1.0~1.4T with residual magnetic flux density.
In the above-mentioned technical solutions, the spacing between the magnetic inductive block is not more than 20mm, the little 20mm of the diameter of steel pipe,
Steel pipe should be located at the middle of magnetic inductive block and be not more than 1mm with the spacing of magnetic inductive block.
In the above-mentioned technical solutions, the spacing of the outer surface of steel tube and magnetic yoke is not less than 10mm.
In the above-mentioned technical solutions, the Magnetic Sensor is not more than 1mm at a distance from steel tube surface.
A kind of steel pipe seam recognition positioning method based on magnetic flux leakage provided by the invention, with following very outstanding
Advantage: the weld seam recognition and positioning of steel pipes with straight can fast and accurately be realized.
Detailed description of the invention
Fig. 1 is a kind of steel pipe seam recognition positioning method structural representation Fig. 1 based on magnetic flux leakage.
Fig. 2 is a kind of steel pipe seam recognition positioning method structural representation Fig. 2 based on magnetic flux leakage.
Fig. 3 is a kind of steel pipe seam recognition positioning method schematic diagram based on magnetic flux leakage.
Each shown by reference numeral in above-mentioned attached drawing indicates that object is respectively as follows: 1- magnetic yoke；2- permanent magnet；3- magnetic inductive block；4- steel
Pipe；5- weld seam；6- Magnetic Sensor；7- magnetization cycle；8- filter；9- amplifier；10- controller；11- magnetic flux leakage.
Specific embodiment
A specific embodiment of the invention is provided with reference to the accompanying drawing, and by specific embodiment to one kind of the invention
Steel pipe seam recognition positioning method based on magnetic flux leakage is further described.It is important to note that of the invention is specific
Embodiment is not limited to form described in embodiment.
The direction term being previously mentioned in the specific embodiment below, such as: up, down, left, right, before and after etc., only
It is the direction with reference to attached drawing.Therefore, the direction term used, which is intended merely to facilitate, illustrates the present invention, is not used to limit this hair
It is bright.
A kind of steel pipe seam recognition positioning method based on magnetic flux leakage of the present embodiment, structural schematic diagram such as Fig. 1 and figure
Shown in 2, composition includes: magnetic yoke 1, and permanent magnet 2, for converging the magnetic inductive block 3 of magnetic induction line, steel pipe 4 is mounted on right above steel pipe
Magnetic Sensor 6.
Steel pipe seam identification positioning is carried out using the present invention, work original is inscribed as shown in figure 3, two permanent magnets 2 and magnetic yoke
1 and magnetic inductive block 3 formed magnetization cycle 7.Steel pipe 4 is placed among two magnetic inductive blocks 3, steel pipe 4 can be magnetized, and then weld
Magnetic flux leakage 11 is formed right above seam, and Magnetic Sensor 6 is fixed on the position right above steel pipe and is remained stationary, rotating steel tube 4 works as weldering
When seam 5 is located at 6 underface of Magnetic Sensor, Magnetic Sensor will pick up and arrive magnetic leakage signal, through wave filter 8, amplifier 9, by weld seam
Location information pass to controller 10, and then realize the identification and positioning of weld seam.
Claims (9)
1. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage, characterized by comprising: magnetic yoke (1), two pieces of permanent magnets
(2), two magnetic inductive blocks (3) and Magnetic Sensor (6), magnetic yoke form magnetization cycle between permanent magnet and magnetic inductive block, by steel pipe
(4) it being placed between magnetic inductive block and magnetizes, magnetic flux leakage (11) will be formed in position while welding, Magnetic Sensor is fixed between magnetic inductive block,
Right above steel pipe, when weld seam is located at immediately below Magnetic Sensor, Magnetic Sensor pickup stray field signal, through wave filter (8) and
Amplifier (9) eventually arrives at controller (10).
2. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 1, it is characterised in that: described
The quantity of permanent magnet is no less than 2, and is even number, and the permanent magnet quantity at magnetic yoke both ends is equal.
3. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 2, it is characterised in that: described
The residual magnetic flux density of permanent magnet is 1.0 ~ 1.4T.
4. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 1, it is characterised in that: described
Spacing between two magnetic inductive blocks is not more than 20mm.
5. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 4, it is characterised in that: described
Magnetic inductive block can replace different sizes according to different calibers.
6. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 1, it is characterised in that: described
The diameter of steel pipe to be detected is not more than 20mm.
7. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 4 and 6, it is characterised in that:
The steel pipe is located at the middle of two magnetic inductive blocks and the gap of steel pipe and magnetic inductive block is no more than 1mm.
8. according to claim 1 with a kind of steel pipe seam recognition positioning method long based on leakage field described in 6, which is characterized in that
The spacing of the outer surface of steel tube and magnetic yoke is not less than 10mm.
9. a kind of steel pipe seam recognition positioning method based on magnetic flux leakage according to claim 1, it is characterised in that: described
Magnetic Sensor is located at right above steel pipe, and holding position is constant, is not more than 1mm with the spacing of steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810598303.6A CN108941357B (en) | 2018-06-12 | 2018-06-12 | Steel pipe weld joint identification and positioning method based on leakage magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810598303.6A CN108941357B (en) | 2018-06-12 | 2018-06-12 | Steel pipe weld joint identification and positioning method based on leakage magnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108941357A true CN108941357A (en) | 2018-12-07 |
| CN108941357B CN108941357B (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810598303.6A Active CN108941357B (en) | 2018-06-12 | 2018-06-12 | Steel pipe weld joint identification and positioning method based on leakage magnetic field |
Country Status (1)
| Country | Link |
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| CN (1) | CN108941357B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63221239A (en) * | 1987-03-10 | 1988-09-14 | Sumitomo Metal Ind Ltd | Leakage flux detection method |
| DE3832034A1 (en) * | 1988-09-21 | 1990-03-22 | Stemme Otto | Testing device for ferromagnetic tubes and/or rods |
| CN2446518Y (en) * | 2000-09-21 | 2001-09-05 | 钢铁研究总院 | Steel pipe magnetic leakage crack detection device |
| GB2492745A (en) * | 2011-06-06 | 2013-01-16 | Silverwing Uk Ltd | Magnetic flux leakage inspection |
| CN103175891A (en) * | 2013-02-28 | 2013-06-26 | 厦门大学 | Permanent magnet and pulsed eddy current composite magnetic flux leakage detection method |
| JP2013185951A (en) * | 2012-03-08 | 2013-09-19 | Jfe Steel Corp | Magnetic flaw detection probe |
| CN103353478A (en) * | 2013-06-28 | 2013-10-16 | 厦门大学 | Magnetoacoustic tomography and magnetic leakage tomography compounded non-destructive detection method |
| CN103776897A (en) * | 2014-02-18 | 2014-05-07 | 华中科技大学 | Magnetic flux leakage testing method and device based on defect magnetic flux leakage region reversed field |
| CN104240895A (en) * | 2014-05-04 | 2014-12-24 | 上海岩川电磁科技有限公司 | Magnetizing magnetic circuit structure |
| CN205749397U (en) * | 2016-06-22 | 2016-11-30 | 国网江西省电力公司南昌供电分公司 | A kind of steel tube defect detection device |
| CN206489114U (en) * | 2017-01-18 | 2017-09-12 | 中特检科技发展(北京)有限公司 | The sensor and system of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting |
-
2018
- 2018-06-12 CN CN201810598303.6A patent/CN108941357B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63221239A (en) * | 1987-03-10 | 1988-09-14 | Sumitomo Metal Ind Ltd | Leakage flux detection method |
| DE3832034A1 (en) * | 1988-09-21 | 1990-03-22 | Stemme Otto | Testing device for ferromagnetic tubes and/or rods |
| CN2446518Y (en) * | 2000-09-21 | 2001-09-05 | 钢铁研究总院 | Steel pipe magnetic leakage crack detection device |
| GB2492745A (en) * | 2011-06-06 | 2013-01-16 | Silverwing Uk Ltd | Magnetic flux leakage inspection |
| JP2013185951A (en) * | 2012-03-08 | 2013-09-19 | Jfe Steel Corp | Magnetic flaw detection probe |
| CN103175891A (en) * | 2013-02-28 | 2013-06-26 | 厦门大学 | Permanent magnet and pulsed eddy current composite magnetic flux leakage detection method |
| CN103353478A (en) * | 2013-06-28 | 2013-10-16 | 厦门大学 | Magnetoacoustic tomography and magnetic leakage tomography compounded non-destructive detection method |
| CN103776897A (en) * | 2014-02-18 | 2014-05-07 | 华中科技大学 | Magnetic flux leakage testing method and device based on defect magnetic flux leakage region reversed field |
| CN104240895A (en) * | 2014-05-04 | 2014-12-24 | 上海岩川电磁科技有限公司 | Magnetizing magnetic circuit structure |
| CN205749397U (en) * | 2016-06-22 | 2016-11-30 | 国网江西省电力公司南昌供电分公司 | A kind of steel tube defect detection device |
| CN206489114U (en) * | 2017-01-18 | 2017-09-12 | 中特检科技发展(北京)有限公司 | The sensor and system of type multimode electromagnetic ultrasound and Magnetic Flux Leakage Inspecting |
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| CN108941357B (en) | 2021-04-09 |
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